Ferrous alloy



Patented Sept. 13,11932 UNITED STA ES PATENT OFFICE E. ALTON MITGHELL AND ALFRED W. GREGG, OF COLUMBUS, OHIO, 'A SSIGNOBS TO THE I DONKEY-FLOYD COMPANY,

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FER-R0118 ALLOY No Drawing. Original application fled January .16, l filed April 24, 1981.

This invention relates to a novel and improved wear resisting ferrous alloy which we. have developed'for use in the construction and formation of machine parts that are, muse, 3 subjected to friction, abrasion and other conditions tending to wear and render the same unfit for eflicient service.

It has long been known that, for parts of machinery which must withstand severe-wear, abrasion and shock, a relatively soft body of material such as steel, coated or surfaced w th a much harder material, gives .far super or results. The relativelysofter body material has ideal properties. to, withstand shock wlthout fracture, while the very hard surface will withstand the abrasion and wear towhlch it may be subjected. Cases in which our mvention is especially applicable are, among many others, dipper teeth, bucket lips, tool points, well drilling bits, conveyor parts, crushing. rolls and so forth. In most cases these parts are made up of a relatively soft base metal such as cast, rolled or forged carbon or alloy steel which has inferior, abrasion resistant properties. Our' invention has particular I reference to a material for applying'a surface or coating on such cast, rolled or forged material to greatly increase its useful life under conditions of severe service.

The alloy to which this invention refers may be cast .in suitable form to cover and protect the parts subjected to wear by attaching it thereto by welding, mechanical means or it may be prepared in the form of welding rod and apnlied to these parts by any welding process such as electric arc welding, oxyacetylene welding and the like. The latter method is usually preferred, but our inven tion is not to be limited to this preferred method of application.

This application is a true division of our co-pending application,,Serial No. 421,306, filed January 16, 1930.

1980, Serialm). 421,806. Divided and this application Serial No. 582,704. v Broadly, the range of proportions of althe balance being iron except for impurities such as phosphorus and sulphur, which are incidental to the manufacture.

. A composition which we have used' successfully is as follows:

An alloy of approximately the following composition Per cent Tungsten Nickel Carbon 3.00 Manganese .7 5 Silicon- 1.00 Aluminum .50 Vanadium 1.00

the balance being iron except for impurities such as phosphorus and sulphur, which are incidental ,to the manufacture. This alloy when applied to the wearing parts of dipper teeth and the like has increased their useful life in many cases as much as tenfold, The resistance 'to abrasion is a direct result of the extreme hardness of the material which in most cases is in excess of 700 measured on standard Brinell hardness scale. This extreme hardness is brought about by the peculiarcombination of the alloys used and maintained without any hardening heat treatment such as is required by many of the socal'led tool steels:

One of the outstanding features of this almg elements in our compos1t1on are as f0 lows:

Per cent Per cent Tungsten 1. 00 to 12. 00 Tungsten 2. 00 to 6. 00 Chromium 1. 00 to 10. 00 Chromium 2. 00 to 6. 00 Nickel 10 to 5. 00 Nickel to 3. 00 Aluminum 10 to 8. 00 Aluminum 10 to 4. Vanadium--- 10 to 2. 00 Vanadium 10 to 1. 00 Carbon 1. to 4. 00 Carbon 2. 00 to 3. 50 Manganese 50 to 5. 00 Manganese '..7 4 50 to 2. 00 S11icon 20 to 3. 00 Silicon 20 to 2. 00

4.00 Chromium 4.00

loy resides in the fact that it fuses at a relathe fusing temperatureof other hardening alloys now in use for similar purposes. This low fusing temperature is of ver great importance in the matter of avoi ing in'u'r Q 5 to the relatively softer materials to w ie the alloy is applied. Again,'the alloy is both economlcal to produce and apply and its application to a softer body of metal increases with accompanying economy in the matter of maintaining a. machine so protected in prolonged use and operation. This last factor is of considerable importance in the operation of many large machines whereinthe time required to replace worn parts is of far greater economic importance than the mere value of the worn or substituted parts.

Molybdenum may be added to the above compositions in amounts from 10% to 6.00%,

examples of the same being as follows;

the balance being iron except for impurities such as phosphorus and sulphur, which are incidental to the manufacture.

N0. 2.- Per cent Tungsten 2.00 to 6.00 1 Chromium 2.00 to 6.00 Ni clml .50 150 3.00 Aluminum .10 to 4.00 v Vanadium .10.to 1.00 Carbon 2.00to 3.50 I Manganese .50 to 2.00 Silicon' .20 to 2.00 Molybdenum 3.00 to 6.00

the balance being iron except for impurities such as phosphorus and sulphur, which are incidental-to the manufacture. v

' Percent Tungst n 4.00 Chromium 4.00

Nickel i 1.00

Carbon 3.00

Manganese .75

Silicon 1,00

- Molybdenum 5.00

Aluminum .50

' Vanadium 1.00

thebalance being iron except for impurities suchas phosphorus and sulphur, which are 56 incidental to the manufacture.

many times the ordinary life of the latter.

While the invention has been described in detail, particularly with reference to the matter of the specific composition and prep;- aration of the materials entering into the formation of our improved alloy, yet it will be understood that we do not limlt ourselves to the exact formula given but reserve the right to employ such variations or .equivalents that can be said to fall within the scope and spirit of the following claims.

What is claimed is 1. An alloy containing 2.00% to 12.00%

' tungsten, 1.00% to 10.00% chromium, .10%

to 5.00% nickel, .10% to 8.00% aluminum,

.10%'to 2.00% vanadium, 1.75% to 4.00%

carbon, .50% to 5.00% manganese, .20% to 3.00% silicon, the balance being predominantly iron, said alloy having a high degree of hardness and a comparatively low fusing temperature.

2. An alloy iron containing 2.00% to 6.00 tungsten, 2.00% to 6.00% chromium, .50%

to 3.00% nickel, .10% to 4.00% aluminum,

.10% to 1.00% vanadium, 2.00% to 3.50%v

carbon, .50% to 2.00% manganese, .20% to 2.00% silicon, the balance being predominantly iron.

3. An alloy of approximately the following composition:

Per cent Tungsten 4.00 Chromium 4.00- Nickel 1.00 Carbon 3.00 Manganese .75 Silicon 1.00 ,Aluminum. .50 Vanadium 1.00

the balancing bein iron except'for impurities'such as phosp orus and sulphur, which are incidental to the manufacture.

4.- An alloy containing 2.00% to 12.00% tungsten, 1.00% to 10.00% chromium,l.10% to 5.00% nickel, .10% to 8.00% aluminum, .10% to 2.00% vanadium,.1.75% to 4.00% carbon, .50% to 5.00% manganese, .20% to 3.00% silicon, .10% to 6.00% molybdenum,'.

the-balance being iron except for impurities such as phosphorus and sulphur, which are incidental to the manufacture, the total content of tungsten and molybdenum being less than 13%, said alloy having a high degree of hardness and a comparatively low fusing.

temperature.

5. An alloy iron containing 2.00% to 6.00%

'tungsten,-2.00% to 6.00% chromium, .50%

to 3.00% nickel, .10% to 4.00% aluminum,

.10% to 1.00% vanadium, 2.00% to 3.50%" carbon, .50% to 2.00% manganese, .20% to 2.00% silicon, 3.00% to 6.00% molybdenum, the balance being iron except for impurities such as phosphorus and sulphur, which are incidental to the manufacture.

.6. An alloy of pp mately the foudkw ing composition: P I

I el'oen Tungsten 4.00 Chromium; 4.00 Nickel" 1.00 Carbon 4--. 3.00 .Manganese .75 Silicon 1.00 Molybdenum -3. 5.00 A1un1inum .50 Vanadium i- 1.00

the balance being iron except for impurities 'such as phosphorus and sulphur, which are 1 incidental to the manufacture. In testimony whereof we aflix our signatures. .i r

H. ALTON MITCHELL. ALFRED W. GREGG, 

